Improper Access Control

github.com/mattermost/mattermost-server is vulnerable to Improper Access Control. The vulnerability is due to the failure to disallow unsolicited invites when shared channels are enabled, This allowing an attacker to send an invite with the ID of an existing local channel, causing that local...

GO-2024-3025 Mattermost failed to disallow the modification of local users when syncing users in shared channels in github.com/mattermost/mattermost-server

Mattermost failed to disallow the modification of local users when syncing users in shared channels in github.com/mattermost/mattermost-server...

GO-2024-3028 Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel in github.com/mattermost/mattermost-server

Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel in github.com/mattermost/mattermost-server...

Mattermost did not properly restrict channel creation

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled...

Mattermost allows a user on a remote to set their remote username prop to an arbitrary string

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5, 9.8.x = 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the...

GHSA-VVPG-55P7-5H8W Mattermost did not properly restrict channel creation

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled...

GHSA-Q22Q-2RRF-M27P Mattermost allows unsolicited invites to expose access to local channels

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5 and 9.8.x = 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local...

GHSA-JR9X-3X7M-4J75 Mattermost allows a remote actor to make an arbitrary local channel read-only

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5 and 9.8.x = 9.8.1 fail to disallow the modification of local channels by a remote, when shared channels are enabled, which allows a malicious remote to make an arbitrary local channel read-only...

GHSA-VG67-CHM7-8M3J Mattermost allows remote actor to create/update/delete posts in arbitrary channels

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5, 9.8.x = 9.8.1 fail to properly validate synced posts, when shared channels are enabled, which allows a malicious remote to create/update/delete arbitrary posts in arbitrary channels...

Mattermost failed to disallow the modification of local users when syncing users in shared channels

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5, 9.8.x = 9.8.1 fail to disallow the modification of local users when syncing users in shared channels. which allows a malicious remote to overwrite an existing local user...

Mattermost failed to properly validate synced reactions

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts...

GHSA-CMC8-222C-VQP9 Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5 and 9.8.x = 9.8.1 fail to properly validate that the channel that comes from the sync message is a shared channel, when shared channels are enabled, which allows a malicious remote to add users to arbitrary teams and channels...

GHSA-JQ3G-XQPX-37X3 Mattermost failed to properly validate synced reactions

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts...

CVE-2024-41144

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5, 9.8.x = 9.8.1 fail to properly validate synced posts, when shared channels are enabled, which allows a malicious remote to create/update/delete arbitrary posts in arbitrary channels...

CVE-2024-41162

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5 and 9.8.x = 9.8.1 fail to disallow the modification of local channels by a remote, when shared channels are enabled, which allows a malicious remote to make an arbitrary local channel read-only...

CVE-2024-39837

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled...

CVE-2024-29977

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts...

CVE-2024-41162 Malicious remote can make an arbitrary local channel read-only

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5 and 9.8.x = 9.8.1 fail to disallow the modification of local channels by a remote, when shared channels are enabled, which allows a malicious remote to make an arbitrary local channel read-only...

CVE-2024-41144 Malicious remote can create/update/delete arbitrary posts in arbitrary channels

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5, 9.8.x = 9.8.1 fail to properly validate synced posts, when shared channels are enabled, which allows a malicious remote to create/update/delete arbitrary posts in arbitrary channels...

CVE-2024-41144 Malicious remote can create/update/delete arbitrary posts in arbitrary channels

Mattermost versions 9.9.x = 9.9.0, 9.5.x = 9.5.6, 9.7.x = 9.7.5, 9.8.x = 9.8.1 fail to properly validate synced posts, when shared channels are enabled, which allows a malicious remote to create/update/delete arbitrary posts in arbitrary channels...